public static CalculatedSeed pullCache(int seed, ConnectionMultiplexer redis)
{
var db = redis.GetDatabase();
var pwdHash = new HashEntry[1];
var seedResult = new CalculatedSeed();
try
{
pwdHash = db.HashGetAll(Convert.ToString(seed));
seedResult = new CalculatedSeed(seed, pwdHash.ToDictionary());
}
catch (RedisConnectionException)
{
}
return(seedResult);
}
private static int Main(string[] args)
{
var filePath = "";
var startDate = DateTime.MinValue;
var startSeed = 0;
var endSeed = 0;
var multi = false;
int fileTicks;
int buffer;
int offset;
string outdir;
var verbose = false;
var delete = false;
ConnectionMultiplexer redis = null;
var encryptedFiles = new List <EncryptedFile>();
var result = Parser.Default.ParseArguments <Options>(args);
// attempt to parse commandline options, write help if failed
if (result.Tag == ParserResultType.Parsed)
{
var parsed = (Parsed <Options>)result;
var options = parsed.Value;
if (options.verbose)
{
verbose = true;
}
// load either single file or directory
if (options.cryptedFilePath != null)
{
filePath = options.cryptedFilePath;
outdir = new FileInfo(filePath).Directory.ToString();
if (File.Exists(options.cryptedFilePath))
{
encryptedFiles.Add(new EncryptedFile(options.cryptedFilePath));
}
else
{
Console.WriteLine("Error: Input file not found");
return(2);
}
}
else if (options.dir != null)
{
if (Directory.Exists(options.dir))
{
outdir = options.dir;
if (verbose)
{
Console.WriteLine("Scanning directory {0} for encrypted files", options.dir);
}
foreach (var file in Directory.EnumerateFiles(options.dir, "*.evil*"))
{
encryptedFiles.Add(new EncryptedFile(file));
}
if (verbose)
{
Console.WriteLine("Found {0} encrypted files.", encryptedFiles.Count);
}
}
else
{
Console.WriteLine("Error: Invalid directory!");
return(2);
}
}
else
{
Console.WriteLine("Error: Either a file or directory must be specified");
return(2);
}
try
{
startDate = Convert.ToDateTime(options.bootDate);
}
catch (FormatException)
{
Console.WriteLine("Error: Unable to parse date");
return(1);
}
offset = options.offset;
buffer = options.buffer;
if (options.multi)
{
multi = true;
if (verbose)
{
Console.WriteLine("Running in multithreaded mode");
}
}
if (options.delete)
{
delete = options.delete;
}
if (options.redis != null)
{
try
{
redis = ConnectionMultiplexer.Connect(options.redis);
}
catch (RedisConnectionException)
{
Console.WriteLine("Warning: Unable to connect to Redis server. Disabling caching");
redis = null;
}
}
}
else
{
var failedParse = (NotParsed <Options>)result;
return(2);
}
// loop through file(s) and attempt decryption
foreach (var cryptFile in encryptedFiles)
{
fileTicks = getTicks(startDate, cryptFile.file.FullName);
startSeed = fileTicks - offset - buffer;
endSeed = fileTicks - offset;
if (startSeed == 0 || endSeed == 0)
{
Console.WriteLine("Ran out of numbers!");
break;
}
// load encrypted file into memory
cryptFile.loadBytes();
if (verbose)
{
Console.WriteLine("Attmepting to decrypt: {0}", cryptFile.file.Name);
Console.WriteLine("Starting at seed count {0}", startSeed);
}
var seedResults = new List <CalculatedSeed>();
var decryptResult = false;
int loopCount = 0;
for (var seed = endSeed; seed > startSeed; seed--)
{
if (redis != null)
{
var db = redis.GetDatabase();
CalculatedSeed cacheHit = null;
// attempt to pull from redis cache
try
{
cacheHit = pullCache(seed, redis);
}
catch (Exception)
{
cacheHit = new CalculatedSeed();
}
// check if hash was pulled, otherwise generate seed results in place, then attempt to add to redis
if (cacheHit.hashValues.Count != 0)
{
seedResults.Add(cacheHit);
}
else
{
var pwdHashes = createPwdHashes(seed);
var hashDict = pwdHashes.ToDictionary();
try
{
db.HashSet(Convert.ToString(seed), pwdHashes);
}
catch (Exception)
{
Console.WriteLine("Warning: Unable to write to Redis");
}
seedResults.Add(new CalculatedSeed(seed, hashDict));
}
}
// if redis not enabled, just generate seed values and store in memory
else
{
seedResults.Add(new CalculatedSeed(seed, createPwdHashes(seed).ToDictionary()));
}
// check every 10 loops so that large buffers don't suck up memory
if (loopCount % 10 == 0)
{
decryptResult = decryptResult = tryDecrypt(cryptFile, multi, seedResults);
if (decryptResult)
{
break;
}
else
{
if (verbose)
{
Console.Write("\rAttempt number: {0}", loopCount);
}
seedResults = new List <CalculatedSeed>();
}
}
loopCount++;
}
decryptResult = tryDecrypt(cryptFile, multi, seedResults);
if (decryptResult && cryptFile.seed != 0)
{
Console.WriteLine("\nSuccessfully decrypted file. Writing to disk.");
Console.WriteLine("Password: {0}", cryptFile.password);
Console.WriteLine("Seed value: {0}", cryptFile.seed);
Console.WriteLine("Seed value was off by {0} milliseconds!", calDiff(fileTicks, cryptFile.seed));
try
{
writeDecryptedFile(cryptFile.file.FullName, cryptFile.decryptedFilebyte);
if (delete)
{
File.Delete(cryptFile.file.FullName);
}
}
catch (UnauthorizedAccessException)
{
Console.WriteLine("Error: Unable to write decrypted file to disk. Access was denied to path.");
}
}
else
{
Console.WriteLine("\nFailed to decrypt file!");
}
}
return(0);
}
